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Louisville Metro police said they believe they have a way to alleviate the headache that will keep things flowing as much as possible.

In the past, eastbound Market Street has caused serious issues that have really clogged up downtown. There are multiple parking garages on Market Street, so after 8:30 p.m. on Saturday, LMPD will reverse traffic from Sixth Street to 10th Street to head west, allowing motorists to access the I-64 ramp or head south out of town.

With 500,000 to 750,000 people leaving at once and limited interstate access, officials said to plan for a long night.

“So when you pack that cooler that morning and put your drinks in it, just put a little patience and a little joy in there,” LMPD Traffic Lt. Joe Seelye said.

Of note this year, I-65 north from I-64 east is still closed.

Police will cut off traffic on two emergency routes: Second Street from River Road to Jacob Street and Muhammad Ali Boulevard from Clay Street to Ninth Street.

The roads aren't the only concern. This year there will be 24 boats from multiple agencies on the Ohio River. With good weather and a rare Thunder with the river in its banks, organizers expect a huge turnout on the water.

“Please don't make that your maiden voyage that day. That is not the time to try out your boating skills for the first time,” Commander of Special Operations Maj. Kelly Jones said.

Police don't want a repeat of the fatal accident that claimed three lives on Independence Day last year when a boat capsized.

“I think the Fourth of July incident caused everybody a grave concern. And we just wanted to ensure that we reached out and asked for every single piece of help that we could get,” LMPD Maj. Kelly Jones said.

More than 1,200 officers from multiple agencies will be on the Kentucky side of the river.

LMPD will also have special roaming units to respond to disturbances caused by large groups.

As always, Derby Festival officials say no bottles, alcohol or pets are allowed.

Planes and fireworks will be the only the only things in the sky that day, as the area has been declared a no-drone zone.

“A lot of people want to bring down those neat and nifty toys, but they really are a safety hazard and we all know what goes up must come down,” Matt Gibson with the Kentucky Derby Festival said.

The Second Street Bridge will close at 9:30 a.m. Thursday to allow workers to install equipment needed for the fireworks. Waterfront Park opens at 9 a.m. Saturday and the Big Four Bridge closes for pedestrian traffic at the same time.

Across the river in Indiana, an estimated 280,000 people are expected to turn out for Thunder.

State and local officials there have teamed up, and just a short time ago they released details of the plans they've been developing since February.

When it comes to parking, all of Riverside Drive in Jeffersonville will be closed.

Also, from Market and Spring streets to Clarksville there will be no parking.

Those who live in the area are asked to stop by Jeffersonville police for a parking pass.

The best way to leave is by using Utica Pike and Port Road to access I-265, according to police.

There are some additional routes.

“The construction is starting to ease up in the downtown Jeffersonville area, so we've been afforded different areas we didn't have last year or the year prior, so hopefully as that project comes to a conclusion next year, traffic will be a whole lot smoother,” Jeffersonville Police Department Maj. Joshua Lynch said.

Emergency medical services personnel will be patrolling on bikes to help anyone who needs assistance and there will be several first aid stations set up.

While coolers are permitted, alcoholic beverages are not. Grills have also been banned.